Technical Data-Fuel System Pressure Specifications
The table below shows both fuel system pressure specifications.
| VARIABLE FUEL PRESSURE SYSTEM SPECIFICATIONS (6.2L ENGINES) | ||
|---|---|---|
| CRANKING | 520 kPa (75.4 psi) | System operates in open loop during cranking |
| IDLE | 340 - 400 kPa (49 - 58 psi) | Normal operating range at idle - Pressure is dependant on ambient and fuel temp. Pressure is raised during high temp to prevent boiling |
| NORMAL RANGE OF OPERATION | 340 - 550 kPa (49 - 80 psi) | Normal operating range between idle and high engine demand |
| 100% DUTY CYCLE | 600 - 700 kPa (87 - 101.5 psi) | This is regulated by the pressure relief valve in the Fuel Pump. The pressure can vary form pump to pump. |
| 4 CYLINDER (1.0L/1.3L GSET / 2.0L GMET ENGINES) | ||
| CRANKING | 580 kPa (84.1 psi) | System operates in open loop during cranking |
| ALL OTHER OPERATING CONDITIONS | 520 kPa (75.4 psi) | The fixed pressure systems should maintain approximately 84.0 psi during normal operation |
| FIXED PRESSURE SYSTEM SPECIFICATIONS (ALL OTHER ENGINES) | ||
| The fixed pressure systems should maintain approximately 58.0 psi during normal operation | ||
GENERIC SYSTEM SCHEMATIC: